Draft-equalizer.



Patented lune I8, |901.

s. H. sHlPMAN.

DRAFT EUUALIZER.

Application mea Feb. 5, 1901s (No Mcdel.)

"anni me@ Uni @v ASS/kraan lgaujm UNITED STATESv PATENT? Prion."

SAMUEL Il. SHIPMAN, OF WAXAHAOHIE, TEXAS.

DRAFT-EQUALIZER.

SPECLFICATON forming' part of Letters Patent N0. 676,589, dated June 18, 1901.

Application filed February 5, 1901I Serial No. 46,132. (No model.)

To all wil/om t may concern.-

Be it known that I, SAMUEL H. SHIPMAN, a citizen of the United States, residing at Vaxahachie, in the county of Ellis and State of Texas, have invented a new and useful Draft- Equalizer, of which the following is a specification.

This invention relates to draft-equalizers, and has for its object to provide an improved device of this character which is especially applicable to agricultural machines, so as to drive a plurality of animals abreast, and is arranged so that neither of the animals need travel upon ploughed ground. It is furthermore designed to obviate the usual unnecessary looseness of the draft connections and to provide for an adjustable tension upon the connection between the opposite equalizingbars.

With these and other objects in view the present invention consists in the combination and arrangement of parts, as will be hereinafter more fully described, shown in the accompanying drawings, and particularly pointed out in the appended claims, it being understood that changes in the form, proportion, size, and minor details may be made within the scope of the claims without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings, Figure 1 is a top plan view of a draft-equalizing apparatus constructed and arranged in accordance with the present invention. Fig. 2 is a detail cross-sectional view taken on the line 2 2 of Fig. 1. Fig. 3 is a detail sectional view taken on the line 3 3 of Fig. 1. Fig. 4 is adetail perspective view of the means for placingy a tension upon the connection between the equalizing-bars.

Like characters of reference designate corresponding parts in all of the figures of the drawings.

Referring to the drawings, 1 designates a support-as, for instance, a draw bar or beam-and 2 a cross-bar projecting at opposite sides of the support and may be formed by an axle of the device to which the equalizer may be applied. At the forward end of the draw-bar or support there is provided a long equalizing-bar 3', having its inner end fulcrumed to the support, as at 4, and projecting transversely at one side thereof. An

opposite short equalizing-bar 5 lies wholly upon the opposite side of the support and is fulcrurned thereto by means of the pivot-pin or connection 4, which is thereby common to both equalizing-bars. To the outer free ends of the equalizing-bars there are connected the respective doubletrees 6 and 7, which are provided with suitable terminal draft connections 8 and 9, respectively.

In rear of the equalizing-bars and mounted upon the cross-bar 2 is a stepped or double pulley 10, which is located upon the same side of the support 1 asis the short equalizinglever,and therefore at one side of the fulcrumsupport thereof. The lower pulley section or member is of greater diameter than the upper section, and both sections have grooved peripheral edges for the reception of the respectiveilexible cables 11 and 12, of which the cable 11 extends from the outer free end of the short equalizing-bar to the lower and larger member or part of the pulley, while the opposite cable 12 extends from the outer free end of the long equalizing-bar to the upper and smaller part of the pulley. These pulley members or sections are preferably formed integral and in any event should be rigidly 'connected so as to rotate simultaneously in the same direction, whereby one cable is coiled thereon while the other is uncoiling therefrom, and vice versa.

To mount the'pulley, it is provided with a spindle 13, which is fixed thereto and projects at the lower side thereof, so as to be rotatably mounted in one of a series of openings 14, formed vertically through one end portion of the cross-bar 2. Any suitable means may be fitted to the lower projecting end of the spindle to prevent accidental upward displacement thereof-as,for instance, a pin or key 15.

To the upper projecting end of the spindle there is fixedly applied a radial arm 16, which normally extends in rear of the pulley and is provided at its outer free extremity with a friction-roller 17, that is designed to travel in frictional engagement with the under side of a yoke-shaped bridge or bar 18, that is disposed substantially horizontally and has its that extend through suitable openings 2O in the cross-bar2 and are connected thereto by means of the upper and lower nuts 21 and 22,

ICO

opposite ends provided with pendent legs 19, I

that embrace the cross-bar, so as to lixedly mount thebridge, and also provide for .a vertical adjustment thereof, whereby a variable tension may be applied to the double pulley and in turn upon the cables l1 and l2, forming the connection between the two equalizing-bars. draft connections are relieved of their usual unnecessary looseness and the equa-lizingbars may be adjusted to swing with a greater or less degree of looseness, as the occasion may require.

It will be understood that the double pulley and the friction-bridge may be adjusted in opposite directions transversely of the support l by reason of the plurality of perfora-` tions in the cross-bar 2, and the leg portions of the'bridge form stops to be engaged by the 'arm 16, and thereby limit the rotation'of the pulley.

Whatis claimed is l. In adraft-equalizing apparatus, the com-` bination with a support, of an equaliZing-bar fulcrumed thereon, a pulley mounted in rear thereof, a cable connection between the bar and the pulley, and means for applying an adjustable tension upon the pulley'to retard the rotation thereof.

2; Ina draft-equalizin'g apparatus,the combination with an equalizing piVotally-mounted bar, a rotatable pulley in rear thereof, and a cable connection between the bar and the pulley, of an vadjustable ytension 'device in frictional engagement with .the pulley, and constructed to retard the rotation thereof.

3. -In a draft-equalizin g apparatus, the com` bination with a pivotal equalizing-bar, a rotatable pulley'in `rear thereof, and a cable connection between the bar and the pulley ot' a lateral arm connectedA to and movable with the pu'l1ey,and an arcuate bridgebarin fric tional engagement with the arm.

et( In adraft-equalizing apparatus, the com? bination with a support, a pivotal equalizing# bar mounted thereon, a ypulley-mountedfin rear thereof, and a cable connection between the bar and the pulley, of ,a radial arm connected to and movable with ythe pulley, and an arcuate bridge-bar in frictional engagement with the arm,and having terminal legs adjustably mounted u-ponthe support.

By this arrangement the crates l5. In a draft-'equalizing apparatus, the coni;

bination with aV support,.having a cross-bar,

of an equalizing-bar pivotally mounted upon the support in advance of the cross-bar, a pulley mounted upon the cross-bar, a cable connection between theiequalizing-bar and the pulley, a radial arm Xedly connected to and movable with the pulley, and having a friction-'rellenahorizontally-disposedarcuate 'friction-bar extending across and in engagement with the upper side of the friction-roller of the arm, and having terminal legs which pass loosely through openings in the crossb'ar, and pairsv'of nuts upon the respective legs and embracing the cross-bar, whereby the arcuate bridge may be vertically adjusted.

(i. In a draft-equalizing apparatus, the combination with ay support,having across-bar, of along equalizing-*bar ful'crumed at its Yinner end to the support and located'in advance of and opposite the cross-bar, a short equalizying-bar also f ulcrumed to the support and pro;

jecting laterally inthe samev direction as the cross-bar, a double pulley havingpulley mem-k bers of different diameters and rotatably mounted upon the cross-bar outwardly from the fulcrums of the `equalizing-bars, a cable connection between the-outer free end of the ylong equalizing-barand the smaller pulleysections, an opposite cable connection be, tweenrthe free end of the short eguali-Zingbar and' the larger lpulley-section, a radial arm projecting rearwardly from the upper side of the pulley, and having a friction-roller,

a substantially horizontal arcuate fiictional bridge-bar 'extending transversely across and in frictional engagement withthe upper side Y'of the friction-roller, and havingterminalupright legs passed loosely through corresponde 'ing openings in the crossjbar, and -pairs of n uts titted'to the legs and embracing the crossbar, whereby the bridge'maybe vertically adjusted.

In testimony that I 'claim the foregoing as my own I haveheretoaflxed my signature in the presence of witnesses. y v

SAMUEL H; SHIPMAN.

O. H. CHAPMAN, `B. F. JAMES, J. E; COLEMAN. 

